Does Neuroscience Point To Non-Dualism? | Karl Friston
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Prof. Karl Friston is the most cited neuroscientist in the world, renowned for pioneering the framework of active inference and for developing the influential Free Energy Principle (FEP). In this conversation with Hans Busstra, Friston touches on the metaphysics of his FEP, which surprisingly points to non-dualism instead of materialism, as widely assumed.
According to Friston, space and time, the self, and even the FEP itself are mere stories, useful fictions with real explanatory power, which do not give us direct access to the noumenal reality.
Selected papers by Karl Friston:
Friston, K. (2019). A free energy principle for a particular physics. arXiv preprint arXiv:1906.10184. https://arxiv.org/abs/1906.10184
Friston, K. (2010). The free-energy principle: a unified brain theory? Nature Reviews Neuroscience, 11(2), 127–138. https://www.nature.com/articles/nrn2787
Friston, K. (2019). A free energy principle for a particular physics. arXiv preprint arXiv:1906.10184.https://arxiv.org/abs/1906.10184
A great FEP explainer video starting with the Hollow Mask illusion: https://www.youtube.com/watch?v=iPj9D9LgK2A
0:00 Introduction
4:19 The metaphysical shift in neuroscience: back to Plato
7:13 On the ideas of Helmholtz
12:40 The phenomenal and the noumenal, I think therefore I am
16:38 If you would be coupled directly to the world, you would cease to exist
21:37 What’s missing from all of physics
24:34 The cell as the first boundary in our universe
25:38 Is it a physics of life
28:49 The free energy principle is just a principle of least action
31:30 Hans on his difficulty in understanding the term ‘free’ in the free energy principle
35:28 What is ‘surprise’ mathematically
39:48 The gift of Richard Feynman, who came up with the free energy principle
44:50 Karl Friston on his early career as a clinical psychiatrist
53:45 The hollow mask illusion as an example of false inference
59:11 On predictive coding
1:03:41 Is the free energy principle a mathematics of conspiracy theories
1:10:21 The free energy principle in ensembles and what it can tell us about bi-party politics
1:13:15 Are there selves within a bigger self Karl Friston on IIT vs FEP
1:14:45 What are the axioms of the free energy principle
1:18:09 On how Markov blankets scale up
1:20:25 Is the free energy principle a theory of consciousness
1:26:02 FEP is about doing instead of being
1:28:20 Why is it bad not to minimize complexity
1:30:59 Markovian blanket and the metaphysics of what is outside of it
1:36:07 On ‘compressing’ the microphone
1:37:50 What is the ideal level of model making
1:40:39 What is our deepest model of the world
1:50:16 The free energy principle in relationship to the hard problem of consciousness
1:52:48 How our models create pasts and futures
1:56:44 On the tautology of your self as a model
1:58:24 Predictive coding applied to itself
2:00:49 Mary in the black and white room
2:07:06 On Karl’s rather mathematical reading of William James
2:09:36 The free energy principle is itself a story
© 2026 Essentia Foundation. All rights on interview content reserved.

@timdavis2008
April 6, 2026 at 7:48 pm
Great conversation – particularly enjoyed how Karl Friston, in passing, demolished the Mary's Room Thought Experiment with his FEP.
@ManifestatorMind
April 6, 2026 at 7:48 pm
Thank you for great conversation ❤💛❤
@barbaramoyamoreau
April 6, 2026 at 7:48 pm
Perhaps the link between IIT and Free energy principle is something like the ideas of Warm data apply to physics from Nora Bateson
@Jimnbvgy
April 6, 2026 at 7:48 pm
The principle of 1: 2 as 2:3 as 3:1 always all at the same time but can be ‘observed’ distinctly at any time
@ThatTenzing
April 6, 2026 at 7:48 pm
I know I'm gonna have to go through this at least thrice to get it.
@TheReamerSteve
April 6, 2026 at 7:48 pm
As I've mentioned on this channel before, I wrote a book to survive from trauma since literally the day I was born that continued because of the inference my ego made from the abuse as a child, permanently forming illusions of self I had to become consciously aware of to heal. The book is based on Eckhart tolles the power of now when I could not figure out how to live in the present moment, and the process in the book teaches people how to be the observer of self, which for me was spiritual as well as simply a higher conscious presence we can all tap into. That's all I can say about it, but there was higher dimension than myself guiding me and writing this book and becoming the conscious observer of myself to survive. I wish someone would interview me, but I am going to finally after a couple years of healing and gaining confidence start producing videos explaining my process about how to become the conscious observer of one self. It's actually a simple process, but the unraveling is like cutting a baseball open and individually taking each rubber band off one by one. I tested the healing modality on a small number of individuals, and it worked with every single one significantly. Anyway, I don't have a lot of years to live from all the trauma I've been through, so I'm going to get it out there because I believe in it. When you're the conscious observer of yourself, practically anything can be healed and I'm now in the process of feeling a lot of physical issues consciously despite being an athlete my whole life addictively. I love your channel.
@hannespi2886
April 6, 2026 at 7:48 pm
First video mentioning scale-invariance, pointing at the mechanism we’re missing
@hannespi2886
April 6, 2026 at 7:48 pm
1:13:17 – Crucial highlight of shortcomings of IIT!
@nikitasharma1798
April 6, 2026 at 7:48 pm
Shunyata
Thank you for this great conversation Hans and Prof. Karl 🙂
@BenDriskell
April 6, 2026 at 7:48 pm
What is an acceptable age to teach this thinking
@lisaolivia87
April 6, 2026 at 7:48 pm
you had me at 'ocean in a drop'
@NoLefTurnUnStoned.
April 6, 2026 at 7:48 pm
Through a profound psychedelic experience in my mid 20’s and subsequent immersion in Eastern esoteric practices, I arrived at the conclusion that
I Am therefore I think,
many years ago.
Over the decades I’ve been astounded to hear physicists discussing the nature of consciousness and reality in terms often similarly expressed by Hindu, Non-Dualist, Taoist, Zen texts and teachers.
I can’t pretend to be able to keep up very well with the technical jargon of Quantum Mechanics, but it’s heartwarming to hear scientists reaching beyond the materialist realm.
@francesco5581
April 6, 2026 at 7:48 pm
Turok said the same "I am not a materialist" i wonder if you will have a chat with him too … (also he likes Kastrup's analytic idealism)
@MichaelJones-ek3vx
April 6, 2026 at 7:48 pm
Well, I've had complete dissolution of self, after the transition, there was no terror, in fact, the reverse, there was Joy. Specifically, these were seven gm psilocybin trips, or 400 microgram LSD trips. There was no capacity to symbolically understand, no language,. there was only phenomenal experience.
@MichaelJones-ek3vx
April 6, 2026 at 7:48 pm
Wow! Carl Friston Is actually a lucid explainer of his free energy principle. It is a remarkable accomplishment. Thank you Hans And Dr. Fristen.
@Humming-d7r
April 6, 2026 at 7:48 pm
No examples as you both speak, so it mskes absolutely no sense.
@stellae6022
April 6, 2026 at 7:48 pm
I am so glad to see Karl Friston here. Thanks!
@drivewithbishop4426
April 6, 2026 at 7:48 pm
He has enough time on Earth to articulate what I know, before I can do the same.
@adamtovarek5236
April 6, 2026 at 7:48 pm
That was great, Hanz. I like how you’re no longer afraid to talk about idealism head-on—I just thought it hadn’t really caught on here. I’d love to hear his take on death in FEP.
@godwho5365
April 6, 2026 at 7:48 pm
Pure gold 🎟
@godwho5365
April 6, 2026 at 7:48 pm
Hans is perhaps the best interviewer. This was so good.
@zhang_yuxie_longhuo2965
April 6, 2026 at 7:48 pm
One of the very best YT channels
@yrudrc
April 6, 2026 at 7:48 pm
Awesome episode!
@Borninthewrongera
April 6, 2026 at 7:48 pm
Whatever is going on with your sound system, the amount of "mouth noises" coming through made it almost impossible to listen to this. Turn down the mic sensitivity maybe?
@gulsen8015
April 6, 2026 at 7:48 pm
Turkish subtitle please.
@georgegerontas3631
April 6, 2026 at 7:48 pm
Thanks!
@thecasualpolemic7572
April 6, 2026 at 7:48 pm
Is that a geography for dummies on the shelf?
@KairraKat
April 6, 2026 at 7:48 pm
The thing people don't realise is that when you bring things like Friston's theories and Micheal Levin's theories of Cognitive Light Cones, you actually see that the theory of AI or LLMs being capable of awareness does work out, they just have a lower level of that awareness than we do because of the way their architecture works.